kyper-matter/src/utils/envStorage.js

Library to provide simple application functionality like authentication and local/session/token storage for Tesselate applications.

import logger from './logger'
import { isObject } from 'lodash'
let data = {}
/** Gets whether or not local storage exists.
 * @param {String} itemName The items name
 * @param {String} itemValue The items value
 * @return {Boolean}
 *
 */
export function localExists () {
  const testKey = 'test'
  if (typeof window !== 'undefined' && typeof window.sessionStorage !== 'undefined') {
    try {
      window.sessionStorage.setItem(testKey, '1')
      window.sessionStorage.removeItem(testKey)
      return true
    } catch (error) {
      logger.error({
        description: 'Error saving to session storage', error,
        obj: 'storage', func: 'localExists'
      })
      return false
    }
  }
  return false
}

/**
 * @description
 * Safley sets item to session storage. Alias: item()
 *
 * @param {String} itemName The items name
 * @param {String} itemValue The items value
 *
 */
export function setItem (itemName, itemValue) {
  data[itemName] = itemValue
  if (localExists()) {
    // Convert object to string
    if (isObject(itemValue)) {
      itemValue = JSON.stringify(itemValue)
    }
    window.sessionStorage.setItem(itemName, itemValue)
  }
}

/**
 * @description
 * Safley gets an item from session storage. Alias: item()
 *
 * @param {String} itemName The items name
 * @return {String}
 *
 */
export function getItem (itemName) {
  if (data[itemName]) {
    return data[itemName]
  } else if (localExists()) {
    let itemStr = window.sessionStorage.getItem(itemName)
    // Check that str is not null before parsing
    if (itemStr) {
      let isObj = false
      let itemObj = null
      // Try parsing to object
      try {
        itemObj = JSON.parse(itemStr)
        isObj = true
      } catch (err) {
        // Parsing failed, this must just be a string
        // logger.log({message: 'String could not be parsed.', error: err, func: 'getItem', obj: 'storage'})
        isObj = false
      }
      if (isObj) {
        return itemObj
      }
    }
    return itemStr
  } else {
    return null
  }
}

/**
 * @description Safley removes item from session storage.
 *
 * @param {String} itemName - The items name
 *
 */
export function removeItem (itemName) {
  // TODO: Only remove used items
  if (data[itemName]) {
    data[itemName] = null
  }
  if (localExists() && getItem(itemName)) {
    try {
      // Clear session storage
      window.sessionStorage.removeItem(itemName)
    } catch (error) {
      logger.warn({
        description: 'Error removing item from session storage', error,
        obj: 'storage', func: 'removeItem'
      })
    }
  }
}

/**
 * @description
 * Safley removes item from session storage.
 *
 * @param {String} itemName the items name
 * @param {String} itemValue the items value
 *
 */
export function clear () {
  // TODO: Only remove used items
  data = {}
  if (localExists()) {
    try {
      // Clear session storage
      window.sessionStorage.clear()
    } catch (error) {
      logger.warn({
        description: 'Session storage could not be cleared.', error,
        obj: 'storage', func: 'removeItem'
      })
    }
  }
}